Feklissov met the couple and on September 21, he reported to Moscow: "They are young, intelligent, capable, and politically developed people, strongly believing in the cause of communism and wishing to do their best to help our country as much as possible.

"[3] David wrote to his wife, "My darling, I most certainly will be glad to be part of the community project (espionage) that Julius and his friends (the Russians) have in mind.

In November 1944, she visited him in Albuquerque, New Mexico, where he was working as a machinist on the Manhattan Project at Los Alamos.

She rejoined her husband after his release from prison in 1960, and they lived in New York City under assumed names with their children.

[2] She died on April 7, 2008, at the age of 83, a fact that became widely known only when the government, numbering her among the deceased witnesses, released her grand jury testimony a few weeks later.